Java Code Examples for javax.jdo.PersistenceManager#currentTransaction()

public static void startReadOnlyTransaction(PersistenceManager pm)
{
    if (!pm.currentTransaction().isActive())
    {
        // Check to ensure we never write in a readOnly transaction.
        // as should never be called shouldn't use up much extra CPU cycles if any
        //pm.addInstanceLifecycleListener(JDODirtyListener,(Class[]) null);

       //((UserTransaction)pm.currentTransaction()).setUseUpdateLock(false);
        JDOTransaction tx = (JDOTransaction)pm.currentTransaction();
    	//tx.setOption("transaction.serializeReadObjects", false);
        tx.setOption("datanucleus.SerializeRead", false);
        pm.currentTransaction().begin();
        try
        {
            setMySQLReadOnly(pm,true);
        }
        catch (SQLException ex)
        {
            logger.error("Caught unexpected SQLException trying to set ReadOnly true", ex);
            SQLErrorPeer.diagnoseSQLError(ex);
            // What to do now? Need to handle the infamous "communications link error" here?
        }
    }
}
 

@SuppressWarnings({ "rawtypes", "unchecked" })
public void listXMLProducts() {
    PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumdXML, null);
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();

        Query q = pm.newQuery("SELECT FROM " + ProductXML.class.getName());
        List<ProductXML> products = (List<ProductXML>) q.execute();
        Iterator<ProductXML> iter = products.iterator();
        while (iter.hasNext()) {
            ProductXML p = iter.next();
            LOGGER.log(Level.WARNING, "Product name: {0} - Price: {1}", new Object[] { p.getName(), p.getPrice() });
            pm.deletePersistent(p);
        }
        LOGGER.log(Level.INFO, "--------------------------------------------------------------");
        tx.commit();
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }

        pm.close();
    }
}
 

public void persistXML() {
    PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumdXML, null);
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();
        ProductXML productXML = new ProductXML(0, "Tablet", 80.0);
        pm.makePersistent(productXML);
        ProductXML productXML2 = new ProductXML(1, "Phone", 20.0);
        pm.makePersistent(productXML2);
        ProductXML productXML3 = new ProductXML(2, "Laptop", 200.0);
        pm.makePersistent(productXML3);
        tx.commit();
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }
        pm.close();
    }
}
 

@SuppressWarnings({ "rawtypes", "unchecked" })
public void ListProducts() {
    PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();

        Query q = pm.newQuery("SELECT FROM " + Product.class.getName() + " WHERE price > 10");
        List<Product> products = (List<Product>) q.execute();
        Iterator<Product> iter = products.iterator();
        while (iter.hasNext()) {
            Product p = iter.next();
            LOGGER.log(Level.WARNING, "Product name: {0} - Price: {1}", new Object[] { p.name, p.price });
        }
        LOGGER.log(Level.INFO, "--------------------------------------------------------------");
        tx.commit();
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }

        pm.close();
    }
}
 

@SuppressWarnings("rawtypes")
public void DeleteProducts() {
    PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();
        Query query = pm.newQuery(Product.class, "name == \"Android Phone\"");
        Collection result = (Collection) query.execute();
        Product product = (Product) result.iterator().next();
        pm.deletePersistent(product);
        tx.commit();
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }
        pm.close();
    }
}
 

@SuppressWarnings("rawtypes")
public void UpdateProducts() {
    PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();
        Query query = pm.newQuery(Product.class, "name == \"Phone\"");
        Collection result = (Collection) query.execute();
        Product product = (Product) result.iterator().next();
        product.setName("Android Phone");
        tx.commit();
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }
        pm.close();
    }
}
 

public void CreateProducts() {
    PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();
        Product product = new Product("Tablet", 80.0);
        pm.makePersistent(product);
        Product product2 = new Product("Phone", 20.0);
        pm.makePersistent(product2);
        Product product3 = new Product("Laptop", 200.0);
        pm.makePersistent(product3);
        for (int i = 0; i < 100; i++) {
            String nam = "Product-" + i;
            double price = rnd.nextDouble();
            Product productx = new Product(nam, price);
            pm.makePersistent(productx);
        }
        tx.commit();
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }
        pm.close();
    }
}
 

public void rollbackTransaction(PersistenceManager pm) {
  if (pm == null || pm.isClosed()) {
    return;
  }
  Transaction currentTransaction = pm.currentTransaction();
  if (currentTransaction.isActive()) {
    try {
      currentTransaction.rollback();
    } finally {
      pm.close();
    }
  }
}
 

private void commitTransaction(PersistenceManager pm) {
  Transaction currentTransaction = pm.currentTransaction();
  try {
    Preconditions.checkState(currentTransaction.isActive(), "Transaction is not active");
    currentTransaction.commit();
  } finally {
    pm.close();
  }
}
 

private void storeEmployee(Employee[] emp)
{
    PersistenceManager pm = getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    tx.begin();
    pm.makePersistent(emp[0]);
    pm.makePersistent(emp[1]);
    tx.commit();
    pm.close();
    Set projects = emp[0].getProjects();
    emp[0].getName();
    projects.size();
}
 

@SuppressWarnings({ "rawtypes", "unchecked" })
public void QueryJDOQL() {
    PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();

        // Declarative JDOQL :
        LOGGER.log(Level.INFO, "Declarative JDOQL --------------------------------------------------------------");
        Query qDJDOQL = pm.newQuery(Product.class);
        qDJDOQL.setFilter("name == 'Tablet' && price == price_value");
        qDJDOQL.declareParameters("double price_value");
        List<Product> resultsqDJDOQL = qDJDOQL.setParameters(80.0).executeList();

        Iterator<Product> iterDJDOQL = resultsqDJDOQL.iterator();
        while (iterDJDOQL.hasNext()) {
            Product p = iterDJDOQL.next();
            LOGGER.log(Level.WARNING, "Product name: {0} - Price: {1}", new Object[] { p.name, p.price });
        }
        LOGGER.log(Level.INFO, "--------------------------------------------------------------");

        tx.commit();
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }

        pm.close();
    }
}
 

@SuppressWarnings({ "rawtypes", "unchecked" })
public void QuerySQL() {
    PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();

        // SQL :
        LOGGER.log(Level.INFO, "SQL --------------------------------------------------------------");
        Query query = pm.newQuery("javax.jdo.query.SQL", "SELECT * FROM PRODUCT");
        query.setClass(Product.class);
        List<Product> results = query.executeList();

        Iterator<Product> iter = results.iterator();
        while (iter.hasNext()) {
            Product p = iter.next();
            LOGGER.log(Level.WARNING, "Product name: {0} - Price: {1}", new Object[] { p.name, p.price });
        }
        LOGGER.log(Level.INFO, "--------------------------------------------------------------");

        tx.commit();
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }

        pm.close();
    }
}
 

@SuppressWarnings({ "rawtypes", "unchecked" })
public void QueryJPQL() {
    PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();

        // JPQL :
        LOGGER.log(Level.INFO, "JPQL --------------------------------------------------------------");
        Query q = pm.newQuery("JPQL", "SELECT p FROM " + Product.class.getName() + " p WHERE p.name = 'Laptop'");
        List results = (List) q.execute();

        Iterator<Product> iter = results.iterator();
        while (iter.hasNext()) {
            Product p = iter.next();
            LOGGER.log(Level.WARNING, "Product name: {0} - Price: {1}", new Object[] { p.name, p.price });
        }
        LOGGER.log(Level.INFO, "--------------------------------------------------------------");

        tx.commit();
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }

        pm.close();
    }
}
 

private static void startTransaction(PersistenceManager pm) throws SQLException
{
    //((UserTransaction)pm.currentTransaction()).setUseUpdateLock(true);
    JDOTransaction tx = (JDOTransaction)pm.currentTransaction();
	//tx.setOption("transaction.serializeReadObjects", true);
    tx.setOption("datanucleus.SerializeRead", true);
    pm.currentTransaction().begin();
    setMySQLReadOnly(pm,false);
}
 

public void cleanup() {
	try
	{
		Map<String,PersistenceManager> map = (Map<String,PersistenceManager>)super.get();
		if (map != null)
    	for(PersistenceManager pm : map.values())
    	{
    		if(pm == null) return;

    		try 
    		{
    			if(!pm.isClosed()) 
           	 	{
    				TransactionPeer.closeReadOnlyTransaction(pm);
    				Transaction ts = pm.currentTransaction();
    				if(ts.isActive()) 
    				{
                   	 	logger.warn("transaction stil active");
                   	 	ts.rollback();
                	}
    				pm.close();
            	}
    			else
    			{
    				logger.warn("pm is closed");
    			}

    		} 
    		catch(Exception ex) 	
    		{
    			logger.warn("exception on cleanup",ex);
    		} 
    	}
	
	}
    finally {
        set(null);
    }

}
 

@Test
public void givenProduct_WhenNewThenPerformTransaction() {
    PersistenceUnitMetaData pumd = new PersistenceUnitMetaData("dynamic-unit", "RESOURCE_LOCAL", null);
    pumd.addClassName("com.baeldung.libraries.jdo.Product");
    pumd.setExcludeUnlistedClasses();
    pumd.addProperty("javax.jdo.option.ConnectionDriverName", "org.h2.Driver");
    pumd.addProperty("javax.jdo.option.ConnectionURL", "jdbc:h2:mem:mypersistence");
    pumd.addProperty("javax.jdo.option.ConnectionUserName", "sa");
    pumd.addProperty("javax.jdo.option.ConnectionPassword", "");
    pumd.addProperty("datanucleus.autoCreateSchema", "true");
    pumd.addProperty("datanucleus.schema.autoCreateTables", "true");

    PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();
        for (int i = 0; i < 100; i++) {
            String nam = "Product-" + i;
            Product productx = new Product(nam, (double) i);
            pm.makePersistent(productx);
        }
        tx.commit();
    } catch (Throwable thr) {
        fail("Failed test : " + thr.getMessage());
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }
        pm.close();
    }

    pmf.close();
}
 

private PersistenceManager openTransaction() {
  PersistenceManager pm = pmf.getPersistenceManager();
  Transaction currentTransaction = pm.currentTransaction();
  currentTransaction.begin();
  return pm;
}
 

@Test
public void givenProduct_WhenQueryThenExist() {
    PersistenceUnitMetaData pumd = new PersistenceUnitMetaData("dynamic-unit", "RESOURCE_LOCAL", null);
    pumd.addClassName("com.baeldung.libraries.jdo.Product");
    pumd.setExcludeUnlistedClasses();
    pumd.addProperty("javax.jdo.option.ConnectionDriverName", "org.h2.Driver");
    pumd.addProperty("javax.jdo.option.ConnectionURL", "jdbc:h2:mem:mypersistence");
    pumd.addProperty("javax.jdo.option.ConnectionUserName", "sa");
    pumd.addProperty("javax.jdo.option.ConnectionPassword", "");
    pumd.addProperty("datanucleus.autoCreateSchema", "true");
    pumd.addProperty("datanucleus.schema.autoCreateTables", "true");

    PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();
        Product product = new Product("Tablet", 80.0);
        pm.makePersistent(product);
        Product product2 = new Product("Phone", 20.0);
        pm.makePersistent(product2);
        Product product3 = new Product("Laptop", 200.0);
        pm.makePersistent(product3);
        tx.commit();
    } catch (Throwable thr) {
        fail("Failed test : " + thr.getMessage());
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }
        pm.close();
    }

    pmf.close();

    PersistenceManagerFactory pmf2 = new JDOPersistenceManagerFactory(pumd, null);
    PersistenceManager pm2 = pmf2.getPersistenceManager();
    Transaction tx2 = pm2.currentTransaction();
    try {
        tx2.begin();

        @SuppressWarnings("rawtypes")
        Query q = pm2.newQuery("SELECT FROM " + Product.class.getName() + " WHERE price == 200");
        @SuppressWarnings("unchecked")
        List<Product> products = (List<Product>) q.execute();
        for (Product p : products) {
            assertEquals("Laptop", p.name);
        }

        tx2.commit();
    } finally {
        if (tx2.isActive()) {
            tx2.rollback();
        }

        pm2.close();
    }
}
 

@Override
	protected void checkSample(File sample) throws Exception {
		// TODO Auto-generated method stub
		final JAXBContext context = createContext();
		logger.debug("Unmarshalling.");
		final Unmarshaller unmarshaller = context.createUnmarshaller();
		// Unmarshall the document
		final JAXBElement element = (JAXBElement) unmarshaller
				.unmarshal(sample);
		final Object object = element.getValue();
		logger.debug("Opening session.");
		// Open the session, save object into the database
		logger.debug("Saving the object.");
		final PersistenceManager saveManager = createPersistenceManager();
//		saveManager.setDetachAllOnCommit(true);
		final Transaction saveTransaction = saveManager.currentTransaction();
		saveTransaction.setNontransactionalRead(true);
		saveTransaction.begin();
		// final Object merged = saveSession.merge(object);
		// saveSession.replicate(object, ReplicationMode.OVERWRITE);
		// saveSession.get
		// final Serializable id =
		final Object mergedObject = saveManager.makePersistent(object);
		
//		final Object asd = saveManager.detachCopy(object);
		saveTransaction.commit();
//		final Object id = saveManager.getObjectId(mergedObject);
		final Object identity = JDOHelper.getObjectId(object);
		final Object id = identity instanceof SingleFieldIdentity ? ((SingleFieldIdentity) identity).getKeyAsObject() : identity;
		// Close the session
		saveManager.close();

		logger.debug("Opening session.");
		// Open the session, load the object
		final PersistenceManager loadManager = createPersistenceManager();
		final Transaction loadTransaction = loadManager.currentTransaction();
		loadTransaction.setNontransactionalRead(true);
		logger.debug("Loading the object.");
		final Object loadedObject = loadManager.getObjectById(mergedObject.getClass(), id);
		logger.debug("Closing the session.");

		final JAXBElement mergedElement = new JAXBElement(element.getName(),
				element.getDeclaredType(), object);

		final JAXBElement loadedElement = new JAXBElement(element.getName(),
				element.getDeclaredType(), loadedObject);

		logger.debug("Checking the document identity.");

		logger.debug("Source object:\n"
				+ ContextUtils.toString(context, mergedElement));
		logger.debug("Result object:\n"
				+ ContextUtils.toString(context, loadedElement));

		checkObjects(mergedObject, loadedObject);
		loadManager.close();

	}
 

/**
 * PersistenceManager object and Transaction object have a one to one
 * correspondence. Each PersistenceManager object is associated with a
 * transaction object and vice versa. Hence we create a persistence manager
 * instance when we create a new transaction. We create a new transaction
 * for every store API since we want that unit of work to behave as a
 * transaction.
 *
 * Note that there's only one instance of PersistenceManagerFactory object
 * for the service.
 *
 * Synchronized because we obtain persistence manager
 */
public synchronized PersistenceManager openTransaction() {
  PersistenceManager pm = pmf.getPersistenceManager();
  Transaction currentTransaction = pm.currentTransaction();
  currentTransaction.begin();
  return pm;
}